Influence of Micro Sandblasting on the Surface Integrity of the AlTiN Coated Tool Material

Abstract

Due to the high-efficiency, environmental protection the low cost, the micro sandblasting technology is used in the surface treatment of the coated tools. The simulation and application of micro sandblasting of the coated tool are carried out to reveal the surface treatment mechanism and analyze the influence of sandblasting parameters on the tool surface integrity. The flow field erosion simulation model of abrasive-water-air three-phase flow is established. The results show that the maximum velocity and pressure are obtained at the center of jet flow. The pressure distribution on the target surface has little correlation with the distance to the nozzle. The surface morphology of the AlTiN coated tool changes obviously after micro sandblasting. Moreover, the low surface roughness Ra of the blasted tool can be obtained at the small sandblasting pressure and time. Additionally, the residual compressive stress on the surface of the AlTiN coated tool is enhanced after micro sandblasting. This work has practical significance for optimizing micro sandblasting process and improving the surface integrity of coated tools.

Analysis on wear principle and cutting performance of Sialon ceramic tool in high-speed cutting of superalloy Inconel 718

“…In addition, during the separation of the adhesive layer on the rake face and the chips, it forms a tearing and uneven appearance, and then the rake face is characterized by furrow caused by abrasive wear. [4] At the beginning of ceramic cutting, the tool wear forms are mainly adhesion, peeling and boundary damage, which are similar to the later wear forms. Only the heat in the early stage of high-speed cutting does not reach the corresponding level, so the later wear of adhesive wear is not significant.…”